Most calls about a sump pump are replacements rather than first installs. The pit and the drain tile around the footing tend to outlast several pumps, because the pump is the moving part and the rest of the system is not.
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Water that reaches the soil beside a basement wall is collected by drain tile laid at the footing and carried to a pit at the low point of the floor. The pump sits in that pit and lifts the water out of the house. Nothing about that arrangement stops water arriving; it decides where the water goes once it does.
That is why a pump on its own is not the answer to a wet basement. If water is coming through a crack, over the top of a wall or up through the floor, the pump is treating the symptom at the bottom of the room. Which of those is happening is what a basement waterproofing inspection is for.
A sump pump needs electricity, and the weather that fills a basement is the weather that brings the power down. A pump with no backup is at its least useful in exactly the conditions it was bought for.
The two usual answers are a battery backup pump, which is a second pump on its own float and battery, and a water-powered backup, which runs off mains water pressure and needs no power at all but uses water while it runs. Both are worth asking about by runtime: how long it holds up at the rate water actually arrives, not in a catalogue.
A discharge that stops a few feet from the wall puts the water back into the ground the drain tile is draining, and the pump lifts the same water again. How far the line runs, and where it ends in relation to the slope of the ground, is part of the job rather than an afterthought.
Whether a sump may discharge into the sanitary sewer is a question for the city, and the answer differs between jurisdictions. Worth settling before the work rather than after it.
Johnson County soils carry a very high clay content. K-State’s extension office for the county sets out what that does to a foundation: clay swells as it takes up water and shrinks as it dries, with enough force to crack walls. The same saturated ground is what the drain tile and the pump exist to deal with.
A pump here can therefore still be working well after the rain has stopped, which is an argument for sizing it on how much water arrives rather than on the size of the house, and for not treating the backup as optional.
Crack sealing, wall anchors and carbon fiber for bowing walls.
Interior drain tile, sump systems and exterior membranes.
Vapor barriers, drainage and structural piers under sagging floors.
Describe what you are seeing and a licensed foundation repair contractor working in Overland Park will contact you to inspect it. A repair can only be priced once the cause is known, so the quote follows the inspection.